阿摩線上測驗
18. Since 1850, average global temperatures have risen about _ the United Nations says.
(A) .6 degree Celsius
(B) .6 degrees Celsius
(C) .6 degree Celsius's
(D) .6 degrees Celsius's
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統計： A(1), B(0), C(1), D(0), E(0) #3351919
統計： A(1), B(0), C(1), D(0), E(0) #3351919
